Plesiochelyidae

The Plesiochelyidae are an extinct family of turtles in the clade Thalassochelydia originally classified within the Cryptodira suborder, mostly belonging from the Jurassic period.^[1] An alternate study placed the clade Thalassochelydia in the Angolachelonia and outside the Testudines.^[3]

Plesiochelyidae Temporal range: Late Jurassic, Oxfordian–Tithonian PreꞒ Ꞓ O S D C P T J K Pg N
Holotype carapace and plastron of Plesiochelys etalloni (previously Emy etalloni). Mount is situated upside-down.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Pantestudines
Clade:	Testudinata
Clade:	†Thalassochelydia
Family:	†Plesiochelyidae Baur, 1888
Genera[1]
†Craspedochelys †Globochelus †Plesiochelys †Portlandemys †Tropidemys †Hylaeochelys[2]

Palaeoecology

Phosphatic δ¹⁸O values indicate that plesiochelyids were inhabitants of coastal marine environments.^[4]